Towards a holographic quark-hadron continuity

Fadafan, Kazem Bitaghsir; Kazemian, Farideh; Schmitt, Andreas

doi:10.1007/jhep03(2019)183

Cited by 30 publications

(34 citation statements)

References 93 publications

(179 reference statements)

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“…1 and the latent heat between 770 and 1550 MeV/fm 3 . To assess the universality of these findings, it would clearly be very interesting to study, how they get modified with other holographic models of quark matter, such as the Sakai-Sugimoto model [88]. Finally, we note in passing that we have also studied the behavior of the so-called thermal index Γ th ≡ 1 + ∆p ∆ , where ∆x ≡ x − x| T =0 for fixed baryon density, with all three nuclear matter models considered.…”

Section: Resultsmentioning

confidence: 97%

Finite-temperature equations of state for neutron star mergers

et al. 2019

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The detection of gravitational waves from a neutron star merger has opened up the possibility of detecting the presence or creation of deconfined quark matter using the gravitational wave signal. To investigate this possibility, we construct a family of neutron star matter equations of state at nonzero density and temperature by combining state-of-the-art nuclear matter equations of state with holographic equations of state for strongly interacting quark matter. The emerging picture consistently points towards a strong first order deconfinement transition, with a temperature-dependent critical density and latent heat that we quantitatively examine. Recent neutron star mass measurements are further used to discriminate between the different equations of state obtained, leaving a tightly constrained family of preferred equations of state.

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Section: Resultsmentioning

confidence: 97%

Finite-temperature equations of state for neutron star mergers

et al. 2019

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“…Here, the quark density is either created by string sources attached to the tip of the connected flavor branes [19,20] or by a nontrivial abelian gauge field on the flavor branes reaching all the way to the horizon [19][20][21][22]. It is known how to go beyond the pointlike approximation of baryonic matter, by allowing for nonzero instanton widths [23][24][25], and including instanton interactions [26]. Our construction of the quarkyonic phase can be improved in the future by implementing these features.…”

Section: Jhep09(2020)112mentioning

confidence: 99%

“…Massive quarks are of particular interest in the context of a possible quark-hadron continuity: in ref. [26] it was speculated that the model allows for a continuous transition between nuclear and quark matter at zero temperature, which is conceivable in QCD [32][33][34][35], although usually not predicted by phenomenological models. Here we do find a realization of this continuity via the detour of quarkyonic matter: at sufficiently large values of the pion mass, quarks start to appear continuously at a certain chemical potential, while heating up the quarkyonic phase makes baryons melt, such that a pure quark phase is reached continuously.…”

Section: Jhep09(2020)112mentioning

confidence: 99%

“…In this paper, following refs. [20,25,26,36,37], we assume the background to be in the deconfined geometry for arbitrarily low T , which requires a small separation, L πM −1 KK , and is referred to as the "decompactified limit". (Apart from restricting ourselves to the deconfined geometry, L πM −1 KK is never explicitly needed in our calculation.)…”

Section: Jhep09(2020)112mentioning

confidence: 99%

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Holographic quarkyonic matter

Kovensky

Schmitt

2020

J. High Energ. Phys.

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We point out a new configuration in the Witten-Sakai-Sugimoto model, allowing baryons in the pointlike approximation to coexist with fundamental quarks. The resulting phase is a holographic realization of quarkyonic matter, which is predicted to occur in QCD at a large number of colors, and possibly plays a role in real-world QCD as well. We find that holographic quarkyonic matter is chirally symmetric and that, for large baryon chemical potentials, it is energetically preferred over pure nuclear matter and over pure quark matter. The zero-temperature transition from nuclear matter to the quarkyonic phase is of first order in the chiral limit and for a realistic pion mass. For pion masses far beyond the physical point we observe a quark-hadron continuity due to the presence of quarkyonic matter.

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“…(For a recent attempt in this direction using the gauge-gravity duality see Refs. [49][50][51][52].) I will work at zero temperature throughout the paper and employ the mean-field and no-sea approximations for the evaluation of the model.…”

Section: Introductionmentioning

confidence: 99%

Chiral pasta: Mixed phases at the chiral phase transition

Schmitt

2020

Phys. Rev. D

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Interiors of neutron stars are ultradense and may contain a core of deconfined quark matter. Such a core connects to the outer layers smoothly or through a sharp microscopic interface or through an intermediate macroscopic layer of inhomogeneous mixed phases, which is globally neutral but locally contains electrically charged domains. Here I employ a nucleon-meson model under neutron star conditions that shows a first-order chiral phase transition at large densities. In the vicinity of this chiral transition I calculate the free energies of various mixed phases-different "pasta structures"-in the Wigner-Seitz approximation. Crucially, chirally broken nuclear matter and the approximately chirally symmetric phase (loosely interpreted as quark matter) are treated on the same footing. This allows me to compute the interface profiles of bubbles, rods, and slabs fully consistently, taking into account electromagnetic screening effects and without needing the surface tension as an input. I find that the full numerical results tend to disfavor mixed phases compared to a simple steplike approximation used frequently in the literature and that the predominantly favored pasta structure consists of slabs with a surface tension Σ ≃ 6 MeV=fm 2 .

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Towards a holographic quark-hadron continuity

Cited by 30 publications

References 93 publications

Finite-temperature equations of state for neutron star mergers

Finite-temperature equations of state for neutron star mergers

Holographic quarkyonic matter

Chiral pasta: Mixed phases at the chiral phase transition

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